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Truncate number to two decimal places without rounding
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End of support for python 2.7?
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@Basic Except it's not full of vulnerabilities.
– Stian OK
Nov 27 '15 at 16:39
5
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How do I delete rows in a data frame?
...by the '-' operator" -> This is a very misleading wording. Negative indexes are removed and that's it, there is no notion of complement. If you work with logical and try using - it won't work, because the complement operator for logicals is !. The complement of c(2,4,6) in the rows would rather b...
Android Crop Center of Bitmap
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This can be achieved with: Bitmap.createBitmap(source, x, y, width, height)
if (srcBmp.getWidth() >= srcBmp.getHeight()){
dstBmp = Bitmap.createBitmap(
srcBmp,
srcBmp.getWidth()/2 - srcBmp.getHeight()/2,
0,
srcBmp.getHeight(),
srcBmp.getHeight()
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How do you loop in a Windows batch file?
What is the syntax for a FOR loop in a Windows batch file?
8 Answers
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How to remove convexity defects in a Sudoku square?
...he first step is to adjust the brightness in the image, by dividing each pixel with the result of a closing operation:
src = ColorConvert[Import["http://davemark.com/images/sudoku.jpg"], "Grayscale"];
white = Closing[src, DiskMatrix[5]];
srcAdjusted = Image[ImageData[src]/ImageData[white]]
The ...
Ruby: extend self
In Ruby, I understand the basic idea of extend . However, what's happening in this segment of code? Specifically, what does extend do? Is it just a convenient way of making the instance methods into class methods? Why would you do it this way rather than specifying class methods from the beginnin...
No == operator found while comparing structs in C++
...memcmp so long your structs don't contain pointer.
– Xeo
Apr 21 '11 at 6:59
12
@Xeo: memcmp fails...
Calculate size of Object in Java [duplicate]
... do this in Java. Supposedly, C/C++ has sizeOf() method, but this is nonexistant in Java. I tried recording the free memory in the JVM with Runtime.getRuntime().freeMemory() before and after creating the object and then recording the difference, but it would only give 0 or 131304, and nothing in...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
...ompiler features. This means that I am not allowed to write a program and execute it, but I should just write a program that could drive the compiler to compute this sum while compilation and print the result when compilation completes. As a hint, he told me that I may use generics and pre-processor...